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Emerson L2 Data Sheet
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1. Throttling Controller Minimum specific gravity or peers gravity differential for interface applications is 0 10 Snap Acting Controller Minimum specific gravity or specific gravity differential for interface applications is 0 1 Output Signal Pneumatic W on off or W proportional pressure signal Ranges Throttling W 0 2 to 1 0 bar 3 to 15 psig or i 0 4 to 2 0 bar 6 to 30 psig On Off 0 off or full supply pressure on Action Field reversible between direct increasing level increases output signal and reverse increasing level decreases output signal Supply Pressure Requirements Throttling Controller Throttling 1 4 bar 20 psig for 0 2 to 1 0 bar 3 to 15 psig output signal and 2 4 bar 35 psig for 0 4 to 2 0 bar 6 to 30 psig output signal On Off Any desired pressure between 1 4 and 3 4 bar 20 and 50 psig continued L2 Controller D103034X012 Snap Acting Controller Any desired pressure between 1 4 and 5 2 bar 20 and 50 psig direct and 1 4 and 2 4 bar 20 and 35 psig reverse Do not use supply pressure below 1 4 bar 20 psig Supply Pressure Medium Air or natural gas 4 Steady State Air Consumption gt Throttling Controller lt 0 03 normal m3 hr 1 0 scfh at 1 4 bar 20 psig supply pressure Snap Acting Controller lt 0 03 normal m3 hr 1 0 scfh at 1 4 bar 20 psig supply pressure or lt 0 04 normal m3 hr 1 5 scfh at 2 4 bar 35 psig supply pressure in tripped cond
2. Indications Triple scale gauges in 0 to 60 psig 0 to 0 4 MPa 0 to 4 0 bar Construction Materials Controller Case and Cover Marine grade aluminum Relay Body Thermoplastic Relay Trim Stainless steel nitrile Span Levers Stainless steel Sensor Sensor Body LCC O Rings Fluorocarbon Pivot Assembly Stainless steel Displacer Mi Polyvinylchloride PVC or li S31603 SST Sensor Spring Stainless steel Dimensions Refer to figure 1 Hazardous Area Classification Complies with the requirements of ATEX Group II Category 2 Gas and Dust C x m2eD Declaration of SEP Fisher Controls International LLC declares this product to be in compliance with Article 3 paragraph 3 of the Pressure Equipment Directive PED 97 23 EC It was designed and manufactured in accordance with Sound Engineering Practice SEP and cannot bear the CE marking related to PED compliance However the product may bear the CE marking to indicate compliance with other applicable European Community Directives NOTE Specialized instrument terms are defined in ANSI ISA Standard 51 1 Process Instrument Terminology 1 Any deviation from the standard construction described in the input signal specification above office for information requires special displacer sizing considerations Contact your Emerson Process Management sales 2 Minimum specific gravity values apply to both horizontal and vertical displacers with standard l
3. L2 Controller D103034X012 Product Bulletin 34 2 L2 September 2013 Fisher L2 Liquid Level Controller The rugged Fisher L2 liquid level controller uses a displacer type sensor to detect liquid level or the interface of two liquids of different specific gravities This controller is ideal for controlling level on gas separators and scrubbers The reliability of the L2 design makes it well suited for liquid level applications in natural gas production compression and processing The device delivers a pneumatic output signal to a control dump valve The sensor uses a threaded 2 NPT or an NPS 2 CL150 through 1500 slip on flange connection to the vessel Features More Reliable Control Two stage proportional relay with integral action provides more dependable liquid level control Snap Acting or Throttling Control One standard controller available as either throttling or snap acting Vibration Resistant Sensor Dynamics O ring friction and process pressure sensitivity are minimal Performance stays constant with process pressure changes and controller remains vibration resistant NACE Service Ready Standard construction uses materials that comply with the requirements of NACE MRO175 2002 Field Configurable Vertical or Horizontal Displacer Displacer may be adjusted in the field for vertical or horizontal operation without additional parts Field Reversible Output The controller can be adjusted in the fiel
4. R SLIP ON i mer __ LEVER ARM 12 50 302 Z 105 11 88 4 12 1 4 18 NPT SUPPLY CONNECTION i 248 i 9 75 48 r N 1 88 wisn amp D 191 7 50 e O A 155 6 12 PA INCH Notes 1 gt Dimensions include one standard 152 mm 6 inch extension Contact your Emerson Process Management sales office for optional extension lengths 2 gt Dimensions valid with standard displacers only GE08174 A Neither Emerson Emerson Process Management nor any of their affiliated entities assumes responsibility for the selection use or maintenance of any product Responsibility for proper selection use and maintenance of any product remains solely with the purchaser and end user Fisher is a mark owned by one of the companies in the Emerson Process Management business unit of Emerson Electric Co Emerson Process Management Emerson and the Emerson logo are trademarks and service marks of Emerson Electric Co All other marks are the property of their respective owners The contents of this publication are presented for informational purposes only and while every effort has been made to ensure their accuracy they are not to be construed as warranties or guarantees express or implied regarding the products or services described herein or their use or applicability All sales are governed by our terms and conditions which are available upon request We reserve the right to modify or improve the designs or specifications of such
5. d for direct or reverse action m without additional parts The controller also has adjustable gain sensitivity W8418 1 CL1500 Pressure Rating Sensor assembly is designed and specified for ASME B16 34 CL1500 service when using a Polyvinylchloride PVC displacer For PED 97 23 EC maximum pressure is limited to 200 bar 2900 psig Vent Away Case The ability to pipe away exhaust permits using natural gas as the operating medium Easy Maintenance Both the controller and the sensor can be easily disassembled to inspect the process seals and for maintenance EMERSON www Fisher com Process Management Product Bulletin 34 2 L2 September 2013 Specifications Available Configurations Controllers Snap acting or throttling Sensor Displacer type liquid level sensor for mounting to side of tank Displacer travel is transmitted to controller by pivotal movement of displacer rod Input Signal Type Liquid level or liquid to liquid interface Level Change Required for Full Change in Output Signal in a 1 0 Specific Gravity Liquid with 1 4 bar 20 psig Supply Pressure Direct Action and Standard 1 7 8 X 12 Inch 48 x 305 mm Vertical Displacer with Standard Lever Arm Length Minimum Span Level Change mm Inches 1 Maximum Span Level Corralek Change mm Inches 1 Throttling 102 4 305 12 On off 127 5 305 12 Snap acting 13 0 5 20 0 8 Minimum Specific Gravity 2
6. ever arm length see dimension in figure 1 3 Minimum specific gravity differential with standard displacer is 0 4 Minimum specific gravity differential of 0 1 is possible with special displacer Consult your Emerson Process Management sales office for displacer sizing information 4 This product can be used with natural gas as the supply medium Natural gas should contain no more than 20 ppm of H2S 5 Normal m3 hr Normal cubic meters per hour 0 C and 1 01325 bar absolute Scfh Standard cubic feet per hour 60 F and 14 7 psia 6 Converting from a threaded NPT connection to a flange connection is to be done by the end user Refer to Converting a Threaded NPT Connection to a Flange Connection instruction Manual Supplement D103277X012 available at www Fisher com or from your Emerson Process Management sales office 7 tandard lever arm length See figure 1 8 The pressure and temperature limits in this document and any applicable code limitations should not be exceeded Product Bulletin 34 2 L2 L2 Controller September 2013 D103034X012 Figure 1 Dimensions Ve 589 sis 194 ____ 23 19 7 62 335 p _ 13 19 g 287 g 11 88 11 31 pal 48 pe eee ese eee H M188 O ooo Pps a NPT O
7. ition air consumption increases during trip Sensor to Vessel Connection E 2 NPT threaded or W NPS 2 CL150 through 1500 slip on flange connection Controller Connections Supply 1 4 NPT internal located on the bottom of the case Output 1 4 NPT internal located on the top of the case Case Vent 1 4 NPT internal with vent screen assembly located on the back of the case Standard Displacer Size 48 x 305 mm 541 cm 1 7 8 x 12 inches 33 in Maximum Displacer Insertion Length 7 Standard lever arm length plus one 6 inch extension horizontal or vertical Displacer Material and Maximum Sensor Working Pressure 8 PVC Displacer Consistent with CL1500 pressure temperature ratings per ASME B16 34 up to maximum pressure of 258 5 bar 3750 psig For PED 97 23 EC maximum pressure limited to 200 bar 2900 psig 31603 SST Displacer CL600 pressure temperature ratings per ASME B16 34 up to maximum pressure of 99 3 bar 1440 psig Note For slip on flange connection maximum sensor working pressure must be consistent with the flange ratings L2 Controller D103034X012 Specifications continued Product Bulletin 34 2 L2 September 2013 Displacer Material and Sensor Temperature Limits 8 PVC Displacer 29 to 79 C 20 to 175 F 31603 SST Displacer 40 to 204 C 40 to 400 F Operative Ambient Temperature Limits 8 Controller 29 to 71 C 20 to 160 F Standard Supply and Output Pressure Gauge
8. products at any time without notice Emerson Process Management Marshalltown lowa 50158 USA Sorocaba 18087 Brazil Chatham Kent ME4 4QZ UK Dubai United Arab Emirates Singapore 128461 Singapore www Fisher com E M ERSO N 2001 2013 Fisher Controls International LLC All rights reserved i eiit le
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